Sluice-gate for canal-locks



AT i

snow. HrLDnE'rH, or Locxron'r, Nnw YORK."Y

SLUICE-G'ATE FOR CANAL-LOCKS.

do hereby declare that the following is a full and exact description.

`The nature of my invention consists in making the gate (of cast iron) 4in the segment of a cylinder with a triangular arm at each end running far enough apart the radial point or center of the cylinder to contain thev boxes and pivot on which the gate revolves; the front (or convex side) of the gate is of an oblong forni of suitable thickness to sustain the pressure of water in the various situations in which'it maybe placed. The convex' plate (or gate) is strengthened by means of ribs running from edge to edge, and from end to end in the concave side of the gate. The boxes are made of any suitable composition and fitted into Ythe triangular arm'of the gate so as to bring the pivot a little below the radial point from which the convex surface of the gate'is drawn. The boxes and pivots can be replaced whenever it is necessary. On each end of the gate is cast an eccentric slide, the outer edge of which corresponds with the convex surface of the gate. The innerfedge ofsaid slide is drawn with a. radius less than the radius of the convex surface of the gate and is drawn from a point below ythe pivot on which the gate revolves The lower edge of the' gate is made in a suitableA form to lit into a groove in the sill of the frame made for that purpose. On the upper edge of the gate is a cap 'projecting over the convex face of the gate extending the whole lleiigth of the gate and also projecting over the upper end of the eccentric slides whichare on the ends of the' gate the use of which will be' seen in giving a description of the gate and frame together. The cast iron frame in which the gate revolves is of an oblong form corresponding with the form of the gate, consisting of a sill two ends and a cap with flanges which are even with the inside of the frame,

but projecting on the outside of the frame to make it convenient for bolting the frame to the lock gate or wall in which it is set. The flanges also serve to strengthen the gate frame. At each end of the opening the end of the gate frame extends inY a'itriangul'ar form far enough back to receivethepivot on whichV the ga te revolves, which' 'pivot is put through'the endof the frame at a pointy corresponding withthe boxes inthe armbf the`V gate when' the gate is in the frame.'` .Thev pivots are -made fast in the'endfof the frame by a key on theoutsideof said'end'of the frame passing through the end of' i',lfie"pii'nit".LV The boxes aremade fast'in'the ariii of the gate and turn on' the pivot.vv On thelinside of the ends of the frame [are con'centric"A plates, the outer circle of' which corresponds with the' inner` circle of the eccentric'slides" on the end of the gate asv before described.'l Then the gate is put into theframe"anfdf'v shut with the boxes *andy pivots i'nftliei'ry places as before described thef'upper convexl side of the gate comes to a clesejiiit against the back edge of the 'capfof the'fr'ar'nel` The projecting cap on the top edge'o-"the 'gate' projects over the perpendicular" joint :just describedand restsY on theltopof, tlegate frame (but notv on thetopgof 'the flange). The lower edge of the gate sets'in'to a groove in the sill of thef frame made` for f that purpose. y Theeccentric' slides on the end ofthefgate before described rest against I'the concentric'` A'Tnnfronrrcn.

plates on thel end of the frame 'corresponding therewith. Thus `a double' angular'rjoint is top and a groove joint vat the bottom, so asx to effect'u ally prevent" it: from,` Ileaking The lower edge of vthe gateand the: o-peningof the frame are alittle shorter than at the top edge of the' same, so that when'the gate is shut it willmake a close joint atthe ends of the gate, but onopening the gate it im'inedil i ately recedes froml the end ofthe frame,and by means of the pivots being'placedjbelow the= radial point (as before' described)fthez upper edge of the gate` which rests against the' cap' of the v`frame also recedes fromv the.v said capfonl opening the gate, and'falso by means of the eccentric slides (before de# scribed) which forni the' end bearings'o-f the gate when shutv recede from each other 'as the gate is opened, relieving 'the gate from any'bearin'g except therod byl which it lisy opened :and the lpivots on ywhich it turns, j

sure of the Waterion the convex surface Of thegateassists in Opening the gate, which may be made more or less effectual by raising or lowering the pivot, so Vthat a very large heavy gate'may be madeto Open withv perfect ease onV this principle. v A

The VboXes in which lthe pivots move are madefin two parts and may be madesquare, i

Octagon, Or 4anyother shape On the outside which may `be preferred. TheinnerYV side mustbe'boredfout roundof suitable `size to `tit the pivot.

TO enable Others skilled in the art to make and use my invention, reference may-be had to the drawings.

Figure l. showsY the appearance when put into a lock gate. a, a, is thelever to Open the gate. b, is the pivot vuponwhichthe lever moves. c, c, is the rod which attaches the lever to the gate. d, al, is the gatewhich is Opened by the lever a, a.,V f, f, is the gate f frame in whichthe gate moves.V

Fig.'2 shows the gate Open in the culvert in the side wall.

Fig. 3 is a perspective view of the front Yside ofthe gate when Open. g, g, g, g, is the? --cast-ir0n frame in which theA gate moves.

a., is the inside View Of theend Of the frame.v L, Vis the outside view Of the end of the frame. z', z', is the cast-ironV gate which moves in the frame g, g, g,g.; o, is the Outside View of the end of thelgate. j, isthe inside view ofthe endjof the gate. n, n, are thepivots on which fthegate turns. k, is the slide on the gate which rests against the :concentric plates. Z, is a eencentric plate which k rests against when the gate islshut. m, shows the manner ofatt-aching the rod to the gate. p, is the key to fasten the pivot into the frame.

Fig. 4 is a perspective view of theback side of the gate when shut. g, g, g, is the f cast-ironframe.` 7L, it,A are the ends'of the frame.V z', z', z', is the gate. jis the inside view of the end of the gate i, z', z'. n, n, are the pivots upon which the gate turns. 0, is the box forthe pivot t'o Vturn in. e, e, are ribs to strengthen the castings. p, is lthe key to fastenfthe pivot in the frame. The round holesin the frame are for bolting it to the main gate Or wall in which it isset..

Fig. 5 is the end Vview of the gate and frame when Open. fh, is the end of the gate frame. .o isV the end of the gate. d is the slide which rests against the plate d in Fig.

8 when the gate is shut. f, is thepivot. fm.

' the frame.

the manner of Yattachingthe Arods to the gate. i. l l

Fig. 6 is the outside `view ofthe end of Fig. 7 is the outside view of the end of the gate. d, isthe slide which rests against al in Fig 8 when the gate is shut. g, is the cap to secure a close joint. when the gateis shut. -Fig. 8 is the insideend view of the frame.

"cl is the concentricplate. s, is the space for the slide UZ, as in lFigi, when the gate is shut. v is the groove `for the gate to shut into tO securepa close joint...

Fig. 9 is a sectional view OflFig.7. fis

cle of dit-to in Fig. 8 are drawn from apoint below the pivot f, on Vwhich,`tl1e gate turns,

and thereby the .slides are relieved from their bearings immediately onu-Opening the gate, whichjbrings :thelwhole `pressure of water and friction upon `the pivot `7". where it is easily overcome. f

Fig.110 is the Outside view Of the boxes, which are made olf composition or brass.

Fig. 11 is the inside/view ofthe boxes.

Fig. 12 is the inside end view of the boxes.

Fig. 13 isthe outside end View -Of the boxes. i y

Fig. 14 isthe pivot b oX and key.

Fig. 15 `isthe pivot and key, which are made of iron.

What I claimA asmy invention and desire to secure by Letters Patent, is--` p .v

Vl. The makingofthe gate in the segment of aV cylinder revolving onra `pivot at each end and fitting against concentric plates attached to the frame in whichthe gate moves as herein described. p

2.' I claim the placing of the pivots of the segment gatebelow'- the center of the circle ,(of which the segmentLgate is a part),so that in closing the gate a closejoint shall be formed, and by thesame means a greater pressure ofwater is brought upon the gate above the pivots than below which assistsin opening thegate as described.` i A 3.1 also claim as asubstitute for the preceding, the placing the pivots Of the segment gate in the center and placing the plates against which the gate slides a `little eccentric thereto for the same purpose and in the manner described. Gn W. HILDRETH.

Witnesses: i Y Y WILLIAM' GLASGOW, CHas. SEYMOUR.

7 5 the pivot. t is the end of the gate; u is the 

